| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing Fatigue and Fracture: Towards Accurate Prediction
|
| Presentation Title |
Modeling the Effects of Transient Liquid Phase Surface Smoothing on the Fatigue Performance of AM Ti-6Al-4V Microlattices |
| Author(s) |
Kyle Jung, Kendall J Yetter, William LePage, Michael Sangid |
| On-Site Speaker (Planned) |
Kyle Jung |
| Abstract Scope |
The fatigue performance of Additive Manufactured (AM) metal parts is driven by surface roughness and internal defects. To address surface roughness, we are developing a novel strategy that smooths the surfaces of AM metal parts without line-of-sight access to the surface (necessary for complex geometries) using a transient liquid phase surface remelting process. Specimens undergo conformal coating and heat treatment targeting a eutectic reaction at the surface. The treatment strategy improved the fatigue strength of single struts by 10 to 25%. This work extends to microlattice unit cells to investigate the treatment of complex geometries. Sample geometry and microstructures were characterized by high-resolution X-ray microtomography, electron backscatter diffraction, and energy dispersive spectroscopy. Statistically equivalent virtual microstructures were generated to incorporate grain morphology and orientations with realistic sample geometry. Elasto-viscoplastic FFT-based crystal plasticity modeling (EVPFFT) was employed to examine the relationship between surface roughness, porosity, overhang geometry and mechanical performance. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Modeling and Simulation, Additive Manufacturing, Mechanical Properties |